Being able to distinguish a GUID from random data can be useful when debugging obscure code defects. On Windows each GUID generated is of version 4 therefore it has 4 as the first half-byte of the ...

I am trying to write a GUID value to a string in a linq select. The code can be seen below (where c.ID is GUID), but I get the following error: Unable to cast the type System.Guid to type System....

The goal of using a sequential guid is so you can use clustered indexes without the high levels of fragmentation that would normally exist in a clustered index if it was a regular guid, correct?

Is there any way to get the functionality of the Sql Server 2005+ Sequential Guid generator without inserting records to read it back on round trip or invoking a native win dll call? I saw someone ...

I have created a database where I use uniqueidentifier as the primary key. I m trying to run a parametrized query that in the end looks like this. (insert into someTable (uniqueID) Values( 76c14693-...

I once read a blog post by a dev at Microsoft about the anatomy--what individual pieces of data are combined--of a System.Guid. Does anyone have the link? I m not finding it by googling.

I d like to prove that a GUID is not unique in a simple test program. I expected the following code to run for hours, but it s not working. How can I make it work? BigInteger begin = new BigInteger((...

The construtor Void .ctor(System.Guid, Int32) is not supported. this error occured with the following statements: var Test = from r in db.UserRoles join p in db.UserPermissions on new { r....